(19)

(11)

EP 1 322 437 A2

(12)

(88) Date of publication A3: 20.06.2002 (43) Date of publication: 02.07.2003 Bulletin 2003/27 (21) Application number: 01971016.9 (22) Date of filing: 14.09.2001

(51) International Patent Classification (IPC)7: B21D 39/04 (86) International application number: PCT/US0128/819 (87) International publication number: WO 0202/4373 (28.03.2002 Gazette 2002/12)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 22.09.2000 US 668909 (71) Applicant: GENERAL ELECTRIC COMPANY Schenectady, NY 12345 (US)	(72) Inventors: GLESSNER, John, Carl Kings Mills, OH 45034 (US) BAYLIS, Norman, Stanton Salem, NH 03079 (US) (74) Representative: Pedder, James Cuthbert et al GE London Patent Operation,Essex House,12/13 Essex Street London WC2R 3AA London WC2R 3AA (GB)